am 9c43016b: Merge "Bug 5045498 Keep track of RemoteControlClient play state change time" into ics-factoryrom

* commit '9c43016b52afa855156aac2dc81a2bbe1e4ab436':
  Bug 5045498 Keep track of RemoteControlClient play state change time

core/java/com/android/internal/widget/TransportControlView.java

@@ -35,6 +35,7 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.RemoteException;
+import android.os.SystemClock;
 import android.text.Spannable;
 import android.text.TextUtils;
 import android.text.style.ForegroundColorSpan;
@@ -59,6 +60,7 @@ public class TransportControlView extends FrameLayout implements OnClickListener
     private static final int MSG_SET_ARTWORK = 103;
     private static final int MSG_SET_GENERATION_ID = 104;
     private static final int MAXDIM = 512;
+    private static final int DISPLAY_TIMEOUT_MS = 5000; // 5s
     protected static final boolean DEBUG = true;
     protected static final String TAG = "TransportControlView";
 
@@ -142,7 +144,7 @@ public class TransportControlView extends FrameLayout implements OnClickListener
             mLocalHandler = new WeakReference<Handler>(handler);
         }
 
-        public void setPlaybackState(int generationId, int state) {
+        public void setPlaybackState(int generationId, int state, long stateChangeTimeMs) {
             Handler handler = mLocalHandler.get();
             if (handler != null) {
                 handler.obtainMessage(MSG_UPDATE_STATE, generationId, state).sendToTarget();
@@ -401,4 +403,33 @@ public class TransportControlView extends FrameLayout implements OnClickListener
         return false;
     }
 
+    private boolean wasPlayingRecently(int state, long stateChangeTimeMs) {
+        switch (state) {
+            case RemoteControlClient.PLAYSTATE_PLAYING:
+            case RemoteControlClient.PLAYSTATE_FAST_FORWARDING:
+            case RemoteControlClient.PLAYSTATE_REWINDING:
+            case RemoteControlClient.PLAYSTATE_SKIPPING_FORWARDS:
+            case RemoteControlClient.PLAYSTATE_SKIPPING_BACKWARDS:
+            case RemoteControlClient.PLAYSTATE_BUFFERING:
+                // actively playing or about to play
+                return true;
+            case RemoteControlClient.PLAYSTATE_NONE:
+                return false;
+            case RemoteControlClient.PLAYSTATE_STOPPED:
+            case RemoteControlClient.PLAYSTATE_PAUSED:
+            case RemoteControlClient.PLAYSTATE_ERROR:
+                // we have stopped playing, check how long ago
+                if (DEBUG) {
+                    if ((SystemClock.elapsedRealtime() - stateChangeTimeMs) < DISPLAY_TIMEOUT_MS) {
+                        Log.v(TAG, "wasPlayingRecently: time < TIMEOUT was playing recently");
+                    } else {
+                        Log.v(TAG, "wasPlayingRecently: time > TIMEOUT");
+                    }
+                }
+                return ((SystemClock.elapsedRealtime() - stateChangeTimeMs) < DISPLAY_TIMEOUT_MS);
+            default:
+                Log.e(TAG, "Unknown playback state " + state + " in wasPlayingRecently()");
+                return false;
+        }
+    }
 }

media/java/android/media/IRemoteControlDisplay.aidl

@@ -40,7 +40,7 @@ oneway interface IRemoteControlDisplay
     void setCurrentClientId(int clientGeneration, in PendingIntent clientMediaIntent,
             boolean clearing);
 
-    void setPlaybackState(int generationId, int state);
+    void setPlaybackState(int generationId, int state, long stateChangeTimeMs);
 
     void setTransportControlFlags(int generationId, int transportControlFlags);
 

media/java/android/media/RemoteControlClient.java

@@ -29,6 +29,7 @@ import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
 import android.os.RemoteException;
+import android.os.SystemClock;
 import android.util.Log;
 
 import java.lang.IllegalArgumentException;
@@ -494,11 +495,15 @@ public class RemoteControlClient
      */
     public void setPlaybackState(int state) {
         synchronized(mCacheLock) {
-            // store locally
+            if (mPlaybackState != state) {
-            mPlaybackState = state;
+                // store locally
+                mPlaybackState = state;
+                // keep track of when the state change occurred
+                mPlaybackStateChangeTimeMs = SystemClock.elapsedRealtime();
 
-            // send to remote control display if conditions are met
+                // send to remote control display if conditions are met
-            sendPlaybackState_syncCacheLock();
+                sendPlaybackState_syncCacheLock();
+            }
         }
     }
 
@@ -533,6 +538,11 @@ public class RemoteControlClient
      * Access synchronized on mCacheLock
      */
     private int mPlaybackState = PLAYSTATE_NONE;
+    /**
+     * Time of last play state change
+     * Access synchronized on mCacheLock
+     */
+    private long mPlaybackStateChangeTimeMs = 0;
     /**
      * Cache for the artwork bitmap.
      * Access synchronized on mCacheLock
@@ -716,7 +726,8 @@ public class RemoteControlClient
     private void sendPlaybackState_syncCacheLock() {
         if ((mCurrentClientGenId == mInternalClientGenId) && (mRcDisplay != null)) {
             try {
-                mRcDisplay.setPlaybackState(mInternalClientGenId, mPlaybackState);
+                mRcDisplay.setPlaybackState(mInternalClientGenId, mPlaybackState,
+                        mPlaybackStateChangeTimeMs);
             } catch (RemoteException e) {
                 Log.e(TAG, "Error in setPlaybackState(), dead display "+e);
                 detachFromDisplay_syncCacheLock();